DE112004000472T5 - Method and system for automatically detecting defects in the remote video inspection - Google Patents
Method and system for automatically detecting defects in the remote video inspection Download PDFInfo
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- DE112004000472T5 DE112004000472T5 DE112004000472T DE112004000472T DE112004000472T5 DE 112004000472 T5 DE112004000472 T5 DE 112004000472T5 DE 112004000472 T DE112004000472 T DE 112004000472T DE 112004000472 T DE112004000472 T DE 112004000472T DE 112004000472 T5 DE112004000472 T5 DE 112004000472T5
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8803—Visual inspection
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
- G06T7/0008—Industrial image inspection checking presence/absence
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
- G06T7/001—Industrial image inspection using an image reference approach
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/9515—Objects of complex shape, e.g. examined with use of a surface follower device
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30108—Industrial image inspection
- G06T2207/30164—Workpiece; Machine component
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- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
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Abstract
Industrielles
Videoinspektionsssystem zum Detektieren eines möglichen Defektes mit
einer
Akquisitionseinrichtung zum Akquirieren eines Bildes eines Abschnittes
eines rotierenden Gegenstandes und
einer Detektionseinrichtung
zum Detektieren irgendwelcher nichtplanarer Merkmale und irgendwelcher
nicht kontinuierlich gekrümmter
Merkmale, die den möglichen
Defekt in dem Abschnitt des rotierenden Gegenstandes anzeigen.Industrial video inspection system for detecting a possible defect with
an acquisition device for acquiring an image of a portion of a rotating object and
a detection device for detecting any non-planar features and any non-continuously curved features indicating the potential defect in the portion of the rotating article.
Description
Diese Erfindung betrifft generell das Gebiet der ferngesteuerten Videoinspektion, genauer gesagt ein Verfahren und ein System zum automatischen Detektieren von Defekten in Gegenständen, die von einer ferngesteuerten visuellen Vorrichtung inspiziert werden.These This invention relates generally to the field of remote video inspection, more specifically, a method and system for automatically detecting of defects in objects that be inspected by a remote-controlled visual device.
Die ferngesteuerte Videoinspektion (RVI) benötigt ein Benutzer zum Inspizieren von Defekten. Die Defekte können klein und manchmal schwierig zu erkennen sein. Bei einigen Anwendungsfällen, wie beispielsweise der Inspektion von Gasturbinenschaufeln von Flugzeugen oder Anlagen zur Energieerzeugung, muß der Benutzer diverse Turbinenschaufeln in einem sich wiederholenden Vorgang visuell inspizieren. Dabei können Defekte übersehen werden, so daß die Sicherheit der Turbine in Frage steht.The Remote Video Inspection (RVI) requires a user to inspect of defects. The defects can small and sometimes difficult to recognize. In some applications, such as the inspection of gas turbine blades of airplanes or installations for energy production, the must User diverse turbine blades in a repeating Visually inspect the process. Defects can be overlooked So that the Safety of the turbine in question.
Gasturbinen enthalten diverse Inspektionszugangsöffnungen für den Benutzer. Diese Öffnungen sehen einen Zugang zu kritischen Bereichen der Turbine mit einer ferngesteuerten visuellen Vorrichtung, wie beispielsweise einem Endoskop oder einem Boreskop, vor. Die inspizierten Turbinen besitzen typischerweise mehrere Stufen, von denen jede viele Schaufeln besitzt, die inspiziert werden müssen.gas turbines contain various inspection access openings for the user. These openings see access to critical areas of the turbine with one remote-controlled visual device, such as a Endoscope or a borescope, in front. Own the inspected turbines typically several stages, each of which has many blades, which must be inspected.
Bei einer typischen Inspektion wird das Ende des Meßfühlers stationär in einer Position gehalten, die eine klare Sicht auf einen speziellen Abschnitt der Schaufeln einer bestimmten Stufe bietet. Die Turbine wird dann gedreht, so daß jede Schaufel der Stufe sich vor dem Meßfühler vorbei bewegt, während der Inspektor einen Monitor in bezug auf Zeichen einer Beschädigung der Schaufel überwacht. Der Benutzer betrachtet die Bilder und sucht nach Defekten, wie Rissen, fehlendem oder verformten Material, Beulen, betrachtet den Abstand zwischen der Schaufelspitze und dem Turbinenmantel etc. Für jede Stufe sind typischerweise diverse Durchgänge erforderlich. Diese Inspektion ist mit einem sich sehr oft wiederholenden Prozeß verbunden, der häufig spät in der Nacht in einem engen Zeitplan durchgeführt wird, wodurch das Risiko erhöht wird, daß ein Defekt nicht entdeckt wird.at In a typical inspection, the end of the probe becomes stationary in one Position kept a clear view of a special section offers the blades of a certain level. The turbine will then turned so that each Shovel of the stage moves past the probe while the inspector monitors a monitor for signs of blade damage. The user looks at the images and looks for defects, such as cracks, missing or deformed material, bumps, considers the distance between the blade tip and the turbine casing, etc. For each stage typically several passes are required. This inspection is associated with a very repetitive process that is often late in the day Night is done on a tight schedule, reducing the risk elevated will that one Defect is not detected.
Kurz gesagt führt das vorliegende System automatisch eine Analyse von Bildern von einer ferngesteuerten Videoinspektionsvorrichtung durch, um eine Bedienungsperson mit einer Anzeige von Bereichen zu versorgen, die möglicherweise außerhalb der Spezifikation liegen oder die eine detailliertere Analyse durch die Bedienungsperson erforderlich machen. Mustererkennungsalgorithmen finden bei sequentiellen Bildern Anwendung, um nach Anomalien oder Defekten in den Bildern zu suchen. Der Suchbereich ist anfangs auf die Ränder des zu inspizierenden Gegenstandes beschränkt, da hier die Wahrscheinlichkeit von Defekten viel höher ist. Um die Prozeßanforderungen und die Wahrscheinlichkeit einer falschen Detektion zu verringern, ist der Suchbereich auf ein begrenztes Gesichtsfeld und eine begrenzte Tiefe beschränkt. Defekte, wie Beulen oder kleine Risse, werden unter Anwendung von Stereomeßtechniken detektiert. Diese Meßtechniken finden Verwendung, um eine Bilddisparitätskarte vorzusehen. Unter Anwendung von bekannten Triangulationsalgorithmen liefert diese Karte Tiefen- und Distanzinformationen an das Verarbeitungssystem.Short said leads the present system automatically analyzes images from a remote-controlled video inspection device by a To provide the operator with a display of areas that possibly except for Specification or a more detailed analysis require the operator. Pattern recognition algorithms apply to sequential images to look for anomalies or To look for defects in the pictures. The search area is initially on the edges limited to the object to be inspected, since here the probability from defects much higher is. To the process requirements and reduce the likelihood of false detection The search range is limited to a limited field of view Depth limited. Defects, such as bumps or small cracks, are applied using Stereomeßtechniken detected. These measuring techniques find use to provide an image disparity card. Under application from known triangulation algorithms, this map provides depth and distance information to the processing system.
Gemäß einer Ausführungsform der Erfindung besitzt ein industrielles Videoinspektionssystem zum Detektieren eines möglichen Defektes eine Akquisitionseinrichtung zum Akquirieren eines Bildes eines Abschnittes eines rotierenden Gegenstandes und eine Detektionseinrichtung zum Detektieren irgendwelcher nicht planarer Merkmale und irgendwelcher nicht kontinuierlich gekrümmter Merkmale, die den möglichen Defekt in diesem Abschnitt des rotierenden Gegenstandes anzeigen.According to one embodiment The invention has an industrial video inspection system for Detecting a possible Defect an acquisition device for acquiring an image of a Section of a rotating object and a detection device for detecting any non-planar features and any not continuously curved Characteristics that the possible Display defect in this section of the rotating object.
Gemäß einer Ausführungsform der Erfindung besitzt ein industrielles Videoinspektionssystem zum Detektieren eines möglichen Defektes eine Akquisitionseinrichtung zum Akquirieren von mindestens einem ersten und zweiten aufeinanderfolgenden Bild eines Abschnittes eines rotierenden Gegenstandes, eine Vergleichseinrichtung zum Vergleichen des mindestens ersten und zweiten aufeinanderfolgenden Bildes miteinander und eine Detektionseinrichtung zum Detektieren von irgendwelchen Unterschieden zwischen dem ersten und zweiten aufeinanderfolgenden Bild, um auf diese Weise den möglichen Defekt zu detektieren.According to one embodiment The invention has an industrial video inspection system for Detecting a possible Defective an acquisition facility to acquire at least a first and second consecutive image of a section a rotating object, a comparing means for comparing of the at least first and second successive images with each other and a detection device for detecting any Differences between the first and second consecutive Picture, in this way the possible defect to detect.
Gemäß einer Ausführungsform der Erfindung umfaßt ein Verfahren zum Detektieren eines möglichen Defektes die folgenden Schritte: (a) Akquirieren eines Bildes eines Abschnittes eines rotierenden Gegenstandes und (b) Detektieren von irgendwelchen nicht planaren Merkmalen und irgendwelchen nicht kontinuierlich gekrümmten Merkmalen, die den möglichen Defekt in dem Abschnitt des rotierenden Gegenstandes anzeigen.According to one embodiment of the invention a method for detecting a possible defect is the following Steps: (a) Acquire an image of a section of a rotating one And (b) detecting any non-planar Features and any non-continuously curved features that the possible Display defect in the section of the rotating object.
Gemäß einer Ausführungsform der Erfindung umfaßt ein Verfahren zum Inspizieren mit einem industriellen Videoinspektionssystem zur Detektion eines möglichen Defektes die folgenden Schritte: (a) Akquirieren von mindestens einem ersten und zweiten aufeinanderfolgenden Bild eines Abschnittes eines rotierenden Gegenstandes, (b) Vergleichen des mindestens ersten und zweiten aufeinanderfolgenden Bildes miteinander und (c) Detektieren von Unterschieden zwischen dem ersten und zweiten aufeinanderfolgenden Bild, um den möglichen Defekt zu detektieren.According to one embodiment of the invention, a method of inspecting with an industrial video inspection system for detecting a potential defect comprises the steps of: (a) acquiring at least first and second consecutive images of a portion of a rotating article; (b) comparing at least first and second successive image with each other and (c) detecting differences between the first and second consecutive image to the possible defect detect.
Es folgt nunmehr eine kurze Beschreibung der Zeichnungen. Hiervon zeigen:It Now follows a brief description of the drawings. Hereof show:
Wie
man den
Wie
man
Wie
man
In
Wenn
der Benutzer den sequentiellen Bildmodus in Schritt
In
Schritt
Der
Randdetektionsalgorithmus von Schritt
Das
Ausgangssignal dieses Systems ist vorzugsweise eine Anzeige für den Benutzer,
wie ein herausgehobener Bereich auf dem am Display
ZusammenfassungSummary
Es wird ein System beschrieben, das automatisch eine Analyse von Bildern von einer ferngesteuerten Videoinspektionsvorrichtung durchführt, um eine Bedienungsperson mit einer Anzeige von Bereichen zu versehen, die sich möglicherweise außerhalb einer Spezifikation befinden oder eine detailliertere Analyse durch die Bedienungsperson erfordern. Mustererkennungsalgorithmen finden bei sequentiellen Bildern Anwendung, um nach Anomalien oder Defekten in den Bildern zu suchen. Der Suchbereich wird anfangs auf Ränder des inspizierten Gegenstandes beschränkt, wo die Wahrscheinlichkeit von Defekten viel höher ist. Um die Anforderungen an die Verarbeitung und die Wahrscheinlichkeit einer falschen Detektion zu reduzieren, wird der Suchbereich auf ein begrenztes Gesichtsfeld und eine begrenzte Gesichtstiefe eingeengt. Defekte, wie Beulen und kleine Risse, werden unter Stereomeßtechniken oder durch Projektion eines bekannten Ergänzungsbildes in den Defekt detektiert. Diese Techniken finden Verwendung, um einer Bilddisparitätskarte vorzusehen. Unter Anwendung von bekannten Triangulationsalgorithmen liefert diese Karte Tiefen- und Distanzinformationen an das Verarbeitungssystem.It describes a system that automatically analyzes images from a remote video inspection device to provide an operator with a display of areas which may be outside a specification or a more detailed analysis require the operator. Find pattern recognition algorithms application to sequential images for abnormalities or defects to look in the pictures. The search area will initially be on edges of the limited to inspected object, where the probability of defects is much higher. To the requirements on the processing and the probability of false detection To reduce the search range to a limited field of view and limited facial depth. Defects, such as bumps and small cracks, are under stereometry or projection a known supplementary image in detected the defect. These techniques are used to one Bilddisparitätskarte provided. Using known triangulation algorithms This map provides depth and distance information to the processing system.
Claims (54)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/393,341 US20040183900A1 (en) | 2003-03-20 | 2003-03-20 | Method and system for automatically detecting defects in remote video inspection applications |
| US10/393,341 | 2003-03-20 | ||
| PCT/US2004/007904 WO2004086014A1 (en) | 2003-03-20 | 2004-03-15 | Method and system for automatically detecting defects in remote video inspection applications |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE112004000472T5 true DE112004000472T5 (en) | 2006-03-09 |
Family
ID=32988130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE112004000472T Withdrawn DE112004000472T5 (en) | 2003-03-20 | 2004-03-15 | Method and system for automatically detecting defects in the remote video inspection |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20040183900A1 (en) |
| JP (1) | JP2007524809A (en) |
| DE (1) | DE112004000472T5 (en) |
| WO (1) | WO2004086014A1 (en) |
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-
2003
- 2003-03-20 US US10/393,341 patent/US20040183900A1/en not_active Abandoned
-
2004
- 2004-03-15 JP JP2006507212A patent/JP2007524809A/en active Pending
- 2004-03-15 WO PCT/US2004/007904 patent/WO2004086014A1/en not_active Ceased
- 2004-03-15 DE DE112004000472T patent/DE112004000472T5/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008005554A1 (en) * | 2008-01-22 | 2009-07-23 | Rolls-Royce Deutschland Ltd & Co Kg | Apparatus and method for inspecting the surface of a component |
Also Published As
| Publication number | Publication date |
|---|---|
| US20040183900A1 (en) | 2004-09-23 |
| WO2004086014A1 (en) | 2004-10-07 |
| JP2007524809A (en) | 2007-08-30 |
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